Experimental insight into spalling behavior of concrete tunnel linings under fire loading |
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| Authors: | Matthias Zeiml Roman Lackner Herbert A Mang |
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| Institution: | 1. Institute for Mechanics of Materials and Structures, Vienna University of Technology, Karlsplatz 13/202, 1040, Vienna, Austria
2. FG Computational Mechanics, Technical University of Munich, Arcisstra?e 21, 80333, Munich, Germany
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| Abstract: | New experimental insight into the spalling behavior of concrete in fire conditions is presented in this paper. Spalling was
recorded by a high-speed camera. The slow-motion sequences allow us to determine the size, shape, and velocity of the spalled-off
pieces. With this information at hand, the released energy associated with every spalling event is computed and compared to
the energies associated with pore-pressure and thermal-stress spalling. This comparison provides new insight into the impact
of the various thermal, mechanical, and hydral processes controlling concrete spalling. |
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